init

2023/day4/p2/main.rs

@@ -0,0 +1,65 @@
+use std::{fs, vec};
+
+const FILE_PATH: &str = "./input.text";
+
+fn process_line(line: &str) -> i32
+{
+    let mut cards_won = 0;
+
+    // Line processing
+    let line_halves: Vec<&str> = line.split(" | ").collect();
+
+    let first_half: Vec<&str> = line_halves[0].split(": ").collect();
+
+    let winning_numbers: Vec<&str> = first_half[1].split(" ").filter(|num| !num.is_empty()).collect();
+
+    let my_numbers = line_halves[1].split(" ").filter(|num| !num.is_empty());
+
+    for number in my_numbers
+    {
+        if winning_numbers.contains(&number)
+        {
+            cards_won += 1;
+        }
+    }
+
+    return cards_won;
+}
+
+fn main() {
+    let contents = fs::read_to_string(FILE_PATH)
+    .unwrap();
+
+    let lines: Vec<&str> = contents.lines().collect();
+
+    let mut cards_won_sum: i64 = 0;
+    let mut card_values: Vec<(usize, i32)> = Vec::new();
+
+    for index in 0..lines.len()
+    {
+        let mut temp_vec = vec![(index, process_line(lines[index]))];
+        card_values.append(&mut temp_vec);
+
+    }
+
+    let mut cards_won: Vec<(usize, i32)> = card_values.clone();
+
+    while !cards_won.is_empty()
+    {
+        let mut temp_cards_won: Vec<(usize, i32)> = Vec::new();
+        for (index, cards_won_value) in cards_won.clone()
+        {
+            cards_won_sum += 1;
+            for i in (index + 1)..(index + 1 + cards_won_value as usize)
+            {
+                let mut temp_vec: Vec<(usize, i32)> = vec![(i, card_values[i].1)];
+                temp_cards_won.append(&mut temp_vec);
+            }
+        }
+
+        cards_won = temp_cards_won;
+    }
+
+
+    println!("Total cards won: {cards_won_sum}");
+}